Cg. Claessens et T. Torres, A new substitution pattern in subphthalocyanines: Regioselective synthesisand separation of "ortho" derivatives, EUR J ORG C, (8), 2000, pp. 1603-1607
The regioselective preparation of ortho-substituted subphthalocyanides was
achieved employing 3-substituted phthalonitrile derivatives as starting mat
erials. A mechanistic proposal has been outlined.